C# :: Aufgabe #273
2 Lösungen
Funktionswerte einer Parabel berechnen - Windows Forms
Anfänger - C#
von paddlboot
- 04.12.2019 um 16:13 Uhr
Erstelle eine Windows Form, in der Funktionswerte einer Parabel berechnet werden können.
Dafür sollen Start-, Endwert und Schrittweite über Textboxen eingelesen werden und nach dem Betätigen des Berechnen-Buttons die X- und Y-Werte in einer ListBox ausgegeben werden.
Mögliches Aussehen siehe Anhang.
Dafür sollen Start-, Endwert und Schrittweite über Textboxen eingelesen werden und nach dem Betätigen des Berechnen-Buttons die X- und Y-Werte in einer ListBox ausgegeben werden.
Mögliches Aussehen siehe Anhang.
Lösungen:
Form1.cs
C#-Code
Form1.Designer.cs
C#-Code
C#-Code
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;
namespace _273_Parabelrechner
{
public partial class Form1 : Form
{
private static Panel panel_left;
private static Panel panel_right;
private static Dictionary<string, int> values;
public Form1()
{
InitializeComponent();
InitControls();
values = new Dictionary<string, int>();
}
private void InitControls()
{
this.Width = 500;
this.Height = 350;
this.MaximizeBox = false;
this.MaximizeBox = false;
this.FormBorderStyle = FormBorderStyle.Fixed3D;
this.Text = "273 - Parabelrechner";
#region left
panel_left = new Panel();
panel_left.Width = this.Width / 2;
panel_left.Height = this.Height;
panel_left.Location = new Point(0, 0);
GroupBox g = new GroupBox();
g.Width = panel_left.Width - 20;
g.Height = (int)(panel_left.Height - 150);
g.Text = "X-Werte";
g.Name = "GroupBox";
g.Location = new Point(10, 10);
int x = 10, y = 50;
Label l = new Label();
l.Name = "label_Startwert";
l.Text = "Startwert";
l.Location = new Point(x, y);
TextBox tb = new TextBox();
tb.Name = "textbox_Startwert";
tb.Width = (int)(g.Width / 2.5);
tb.Location = new Point(l.Right + 20, l.Top);
tb.KeyUp += Textbox_Validation;
g.Controls.Add(tb);
g.Controls.Add(l);
y += 50;
l = new Label();
l.Name = "label_Endwert";
l.Text = "Endwert";
l.Location = new Point(x, y);
tb = new TextBox();
tb.Name = "textbox_Endwert";
tb.Width = (int)(g.Width / 2.5);
tb.Location = new Point(l.Right + 20, l.Top);
tb.KeyUp += Textbox_Validation;
g.Controls.Add(tb);
g.Controls.Add(l);
y += 50;
l = new Label();
l.Name = "label_Schrittweite";
l.Text = "Schrittweite";
l.Location = new Point(x, y);
tb = new TextBox();
tb.Name = "textbox_Schrittweite";
tb.Width = (int)(g.Width / 2.5);
tb.Location = new Point(l.Right + 20, l.Top);
tb.KeyUp += Textbox_Validation;
g.Controls.Add(tb);
g.Controls.Add(l);
panel_left.Controls.Add(g);
Button b = new Button();
b.Name = "button_berechnen";
b.Text = "&Berechnen";
b.Width = panel_left.Width / 2 - 30;
b.Height = 85;
b.Location = new Point(10, g.Bottom + 5);
b.Click += Click_Calculate;
panel_left.Controls.Add(b);
b = new Button();
b.Name = "button_reset";
b.Text = "&Reset";
b.Width = panel_left.Width / 2 - 30;
b.Height = 85;
b.Location = new Point(g.Right - b.Width, g.Bottom + 5);
b.Click += Click_Reset;
panel_left.Controls.Add(b);
this.Controls.Add(panel_left);
#endregion
#region right
panel_right = new Panel();
panel_right.Width = panel_left.Width;
panel_right.Height = panel_left.Height;
panel_right.Location = new Point(panel_left.Width, 0);
ListBox lb = new ListBox();
lb.Name = "listbox";
lb.Location = new Point(10, 10);
lb.Width = panel_right.Width - 45;
lb.Height = panel_right.Height - 60;
panel_right.Controls.Add(lb);
this.Controls.Add(panel_right);
#endregion
}
private void Textbox_Validation(object sender, KeyEventArgs e)
{
TextBox tb = sender as TextBox;
int value;
if(int.TryParse(tb.Text, out value))
{
tb.BackColor = default(Color);
string key = tb.Name.Replace("textbox_", "");
if (values.ContainsKey(key))
{
values[key] = value;
}
else
{
values.Add(key, value);
}
}
else
{
tb.BackColor = Color.LightPink;
}
}
private void Click_Calculate(object sender, EventArgs e)
{
int startwert, endwert, schrittweite;
if (!values.TryGetValue("Startwert", out startwert) || !values.TryGetValue("Endwert", out endwert) || !values.TryGetValue("Schrittweite", out schrittweite))
{
return;
}
ListBox lb = panel_right.Controls.Find("listbox", true).FirstOrDefault() as ListBox;
lb.Items.Clear();
lb.Items.Add("Berechnete Werte");
lb.Items.Add("-------------------------------");
for (int i = startwert; i <= endwert; i += schrittweite)
{
int x = i;
int y = x * x;
lb.Items.Add($"X: {x}\tY: {y}");
}
}
private void Click_Reset(object sender, EventArgs e)
{
values.Clear();
ListBox lb = panel_right.Controls.Find("listbox", true).FirstOrDefault() as ListBox;
lb.Items.Clear();
}
}
}
Form1.Designer.cs
C#-Code
namespace _273_Parabelrechner
{
partial class Form1
{
/// <summary>
/// Erforderliche Designervariable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Verwendete Ressourcen bereinigen.
/// </summary>
/// <param name="disposing">True, wenn verwaltete Ressourcen gelöscht werden sollen; andernfalls False.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Vom Windows Form-Designer generierter Code
/// <summary>
/// Erforderliche Methode für die Designerunterstützung.
/// Der Inhalt der Methode darf nicht mit dem Code-Editor geändert werden.
/// </summary>
private void InitializeComponent()
{
this.SuspendLayout();
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(9F, 20F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(251, 39);
this.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.Margin = new System.Windows.Forms.Padding(4, 5, 4, 5);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
#endregion
}
}
Hallo,
danke für diese Aufgabe, habe mich zum ersten mal mit der ListBox beschäftigt und viel gelernt.
Ich hoffe das passt so weit :-)
C#-Code
C#-Code
danke für diese Aufgabe, habe mich zum ersten mal mit der ListBox beschäftigt und viel gelernt.
Ich hoffe das passt so weit :-)
C#-Code
using System;
using System.Windows.Forms;
namespace Aufgabe_273_Parabel
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Reset_Button_Click(object sender, EventArgs e)
{
Startwert.Text = "0";
Endwert.Text = "0";
Schrittweite.Text = "1";
listBox1.Items.Clear();
}
private void Start_Button_Click(object sender, EventArgs e)
{
listBox1.Items.Add("Berechnete Werte");
listBox1.Items.Add("- - - - - - - - - - - - - - - - -");
double start = Convert.ToDouble(Startwert.Text);
double schritt = Convert.ToDouble(Schrittweite.Text);
double ende = Convert.ToDouble(Endwert.Text);
for (double i = start; i <= ende; i = i + schritt)
{
listBox1.Items.Add(" X-Wert " + i + " Y-Wert " + i * i);
}
}
}
}
C#-Code
namespace Aufgabe_273_Parabel
{
partial class Form1
{
/// <summary>
/// Erforderliche Designervariable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Verwendete Ressourcen bereinigen.
/// </summary>
/// <param name="disposing">True, wenn verwaltete Ressourcen gelöscht werden sollen; andernfalls False.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Vom Windows Form-Designer generierter Code
/// <summary>
/// Erforderliche Methode für die Designerunterstützung.
/// Der Inhalt der Methode darf nicht mit dem Code-Editor geändert werden.
/// </summary>
private void InitializeComponent()
{
this.groupBox1 = new System.Windows.Forms.GroupBox();
this.Schrittweite = new System.Windows.Forms.TextBox();
this.Endwert = new System.Windows.Forms.TextBox();
this.Startwert = new System.Windows.Forms.TextBox();
this.label3 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.label1 = new System.Windows.Forms.Label();
this.listBox1 = new System.Windows.Forms.ListBox();
this.Start_Button = new System.Windows.Forms.Button();
this.Reset_Button = new System.Windows.Forms.Button();
this.groupBox1.SuspendLayout();
this.SuspendLayout();
//
// groupBox1
//
this.groupBox1.Controls.Add(this.Schrittweite);
this.groupBox1.Controls.Add(this.Endwert);
this.groupBox1.Controls.Add(this.Startwert);
this.groupBox1.Controls.Add(this.label3);
this.groupBox1.Controls.Add(this.label2);
this.groupBox1.Controls.Add(this.label1);
this.groupBox1.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
this.groupBox1.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.groupBox1.Location = new System.Drawing.Point(27, 32);
this.groupBox1.Name = "groupBox1";
this.groupBox1.Size = new System.Drawing.Size(200, 180);
this.groupBox1.TabIndex = 0;
this.groupBox1.TabStop = false;
this.groupBox1.Text = "X-Werte";
//
// Schrittweite
//
this.Schrittweite.Location = new System.Drawing.Point(125, 135);
this.Schrittweite.Name = "Schrittweite";
this.Schrittweite.Size = new System.Drawing.Size(34, 20);
this.Schrittweite.TabIndex = 5;
this.Schrittweite.Text = "1";
this.Schrittweite.TextAlign = System.Windows.Forms.HorizontalAlignment.Right;
//
// Endwert
//
this.Endwert.Location = new System.Drawing.Point(125, 95);
this.Endwert.Name = "Endwert";
this.Endwert.Size = new System.Drawing.Size(34, 20);
this.Endwert.TabIndex = 4;
this.Endwert.Text = "0";
this.Endwert.TextAlign = System.Windows.Forms.HorizontalAlignment.Right;
//
// Startwert
//
this.Startwert.Location = new System.Drawing.Point(125, 50);
this.Startwert.Name = "Startwert";
this.Startwert.Size = new System.Drawing.Size(34, 20);
this.Startwert.TabIndex = 3;
this.Startwert.Text = "0";
this.Startwert.TextAlign = System.Windows.Forms.HorizontalAlignment.Right;
//
// label3
//
this.label3.AutoSize = true;
this.label3.Location = new System.Drawing.Point(21, 135);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(74, 13);
this.label3.TabIndex = 2;
this.label3.Text = "Schrittweite";
//
// label2
//
this.label2.AutoSize = true;
this.label2.Location = new System.Drawing.Point(21, 95);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(53, 13);
this.label2.TabIndex = 1;
this.label2.Text = "Endwert";
//
// label1
//
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(21, 53);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(58, 13);
this.label1.TabIndex = 0;
this.label1.Text = "Startwert";
//
// listBox1
//
this.listBox1.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.listBox1.FormattingEnabled = true;
this.listBox1.Location = new System.Drawing.Point(264, 32);
this.listBox1.Name = "listBox1";
this.listBox1.Size = new System.Drawing.Size(211, 277);
this.listBox1.TabIndex = 1;
//
// Start_Button
//
this.Start_Button.Location = new System.Drawing.Point(27, 252);
this.Start_Button.Name = "Start_Button";
this.Start_Button.Size = new System.Drawing.Size(90, 50);
this.Start_Button.TabIndex = 2;
this.Start_Button.Text = "Start";
this.Start_Button.UseVisualStyleBackColor = true;
this.Start_Button.Click += new System.EventHandler(this.Start_Button_Click);
//
// Reset_Button
//
this.Reset_Button.Location = new System.Drawing.Point(137, 252);
this.Reset_Button.Name = "Reset_Button";
this.Reset_Button.Size = new System.Drawing.Size(90, 50);
this.Reset_Button.TabIndex = 3;
this.Reset_Button.Text = "Reset";
this.Reset_Button.UseVisualStyleBackColor = true;
this.Reset_Button.Click += new System.EventHandler(this.Reset_Button_Click);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(506, 340);
this.Controls.Add(this.Reset_Button);
this.Controls.Add(this.Start_Button);
this.Controls.Add(this.listBox1);
this.Controls.Add(this.groupBox1);
this.Name = "Form1";
this.Text = "Aufgabe_273_Funktionswerte Parabel";
this.groupBox1.ResumeLayout(false);
this.groupBox1.PerformLayout();
this.ResumeLayout(false);
}
#endregion
private System.Windows.Forms.GroupBox groupBox1;
private System.Windows.Forms.TextBox Schrittweite;
private System.Windows.Forms.TextBox Endwert;
private System.Windows.Forms.TextBox Startwert;
private System.Windows.Forms.Label label3;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.ListBox listBox1;
private System.Windows.Forms.Button Start_Button;
private System.Windows.Forms.Button Reset_Button;
}
}
